Apple's A20 Pro shatters Geekbench 7 single-core record — 2nm chip beats desktop Intel Core i9 and AMD Ryzen 9 by up to 32%
(www.tomshardware.com)
A20 Pro vs Intel Ultra 7 Series 3
From what I've heard, the GPU in the M-series chips are just scaled-up PowerVR derived GPU, with some of the greatest limitations being carried over.
Also the CPU is more optimized for parallel-processing, and many games are still seldom optimized for that.